/*
 * This file is part of the eccOS Library.
 * Copyright (C) 2007.
 *
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 */
package org.openeccos;

import java.util.Calendar;

import javax.servlet.http.HttpServletRequest;

import nextapp.echo2.app.ApplicationInstance;
import nextapp.echo2.app.Window;
import nextapp.echo2.webcontainer.ContainerContext;
import nextapp.echo2.webrender.ClientProperties;
import nextapp.echo2.webrender.WebRenderServlet;

import org.openeccos.dao.EccosService;
import org.openeccos.model.MBrowserSession;
import org.openeccos.model.MUser;
import org.openeccos.util.IApplicationConext;

import com.sas.framework.expojo.ModelExposer;

public abstract class EccosAppInstance extends ApplicationInstance implements IApplicationConext {

	protected transient EccosUserSession userSession;
	protected transient Window window;
	protected transient EccosDesktop desktop;
	//protected transient TaskQueueHandle tqh;
	public transient boolean isIE;

	public EccosAppInstance() {
	}

	public EccosAppInstance(String sessionKey) {
		initWaitCursor(sessionKey);
		HttpServletRequest req = WebRenderServlet.getActiveConnection().getRequest();
		getUserSession().setUser((MUser) req.getSession().getAttribute(EccosUserSession.USER_MAIN_PANEL));
	}

	protected abstract EccosUserSession instantiateNewUserSession();

	public static EccosUserSession getActiveUserSession() {
		EccosAppInstance applicationInstance = (EccosAppInstance) ApplicationInstance.getActive();
		return applicationInstance.getUserSession();
	}

	public EccosUserSession getUserSession() {
		if (userSession == null) {
			userSession = instantiateNewUserSession();
		}
		return userSession;
	}

	protected void initWaitCursor(String sessionKey) {
		// ContainerContext context = (ContainerContext)
		// getContextProperty(ContainerContext.CONTEXT_PROPERTY_NAME);
		// HttpSession session = context.getSession();
		// ContainerInstance containerInstance = (ContainerInstance)
		// session.getAttribute(sessionKey);
		//
		// try {
		// context.setServerDelayMessage(new
		// MbsServerDelayMessage(containerInstance));
		// } catch (Exception e) {
		// e.printStackTrace();
		// }
	}

	public static MBrowserSession getBrowserSession() {
		EccosAppInstance active = EccosAppInstance.getInstance();
		if (active == null) return null;
		ContainerContext context = (ContainerContext)active.getContextProperty(ContainerContext.CONTEXT_PROPERTY_NAME);
		MBrowserSession browserSession = (MBrowserSession)context.getSession().getAttribute(EccosServlet.BROWSER_SESSION);
		if (browserSession == null) {
			ClientProperties props = context.getClientProperties();
			browserSession = new MBrowserSession();
			browserSession.setUserAgent((String)props.get(ClientProperties.NAVIGATOR_USER_AGENT));
			browserSession.setRemoteHost((String)props.get(ClientProperties.REMOTE_HOST));
			browserSession.setUtcOffset((Integer)props.get(ClientProperties.UTC_OFFSET));
			browserSession.setScreenWidth((Integer)props.get(ClientProperties.SCREEN_WIDTH));
			browserSession.setScreenHight((Integer)props.get(ClientProperties.SCREEN_HEIGHT));
			browserSession.setStartupTime(Calendar.getInstance());
			EccosService service = (EccosService)ModelExposer.get().getService(EccosService.NAME);
			service.persist(browserSession);
			context.getSession().setAttribute(EccosServlet.BROWSER_SESSION, browserSession);
		}
		return browserSession;
	}

	protected abstract EccosPerspective getDefaultPerspective();

	EccosDesktop getDesktop() {
		return desktop;
	}

	protected abstract String getTitle();

	@Override
	public Window init() {

		try {
			ContainerContext ctx = (ContainerContext) getContextProperty(ContainerContext.CONTEXT_PROPERTY_NAME);
			ClientProperties props = ctx.getClientProperties();
			isIE = Boolean.TRUE.equals(props.get(ClientProperties.BROWSER_INTERNET_EXPLORER));

			getBrowserSession(); //init the session
		} catch (Exception e) {
			e.printStackTrace();
		}

		window = new Window();
		window.setTitle(getTitle());
		restart();
		return window;
	}

	public boolean isIE() {
		return isIE;
	}

	public void restart() {
		EccosPerspective perspective = getDefaultPerspective();
		desktop = new EccosDesktop(this, perspective);
		desktop.initDesktop();
		window.setContent(desktop);
	}

	public static EccosAppInstance getInstance() {
		return (EccosAppInstance)getActive();
	}
}
